feat(media-libs/libpng) remove as portage-stable has new version

sdk_container/src/third_party/coreos-overlay/media-libs/libpng/Manifest

@@ -1 +0,0 @@
-DIST libpng-1.2.49.tar.xz 538408 SHA256 6f5a313225ce8f0d36aceda25b837ad3cb97d0096a97fa23dbc6362f7781d014 SHA512 2035cfbb7c01300d105b6898f31643d77af2ee33226ddd07870761a9f8a388395829825ba97da3d152c118de4c4c7025dd98a24eb4ead3a90bd10b7159a8adee WHIRLPOOL 623e42525ab7d4eff855d609384fa9938cfa6d8eb3a92cc6e9bf79c79f698ad5cf5946760cc6843f43fde2461a631cf83e8a01fc7f35a123f3a3ab0cb17b80ad

sdk_container/src/third_party/coreos-overlay/media-libs/libpng/files/libpng-1.2.45-build.patch

@@ -1,11 +0,0 @@
---- Makefile.am
-+++ Makefile.am
-@@ -102,7 +102,7 @@
- 
- libpng.sym: png.h pngconf.h
- 	rm -f $@ $@.new
--	$(CPP) @LIBPNG_DEFINES@ $(CPPFLAGS) -DPNG_BUILDSYMS $(srcdir)/png.h $(srcdir)/$@
-+	$(CPP) @LIBPNG_DEFINES@ $(CPPFLAGS) -DPNG_BUILDSYMS $(srcdir)/png.h > $(srcdir)/$@
- 	cat $(srcdir)/$@ | \
- 		$(SED) -n -e \
- 		's|^.*PNG_FUNCTION_EXPORT[ 	]*\([$(AN)]*\).*$$|$(SYMBOL_PREFIX)\1|p' \

sdk_container/src/third_party/coreos-overlay/media-libs/libpng/libpng-1.2.49.ebuild

@@ -1,33 +0,0 @@
-# Copyright 1999-2012 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Header: /var/cvsroot/gentoo-x86/media-libs/libpng/libpng-1.2.47.ebuild,v 1.2 2012/02/20 11:56:37 ssuominen Exp $
-
-# This ebuild uses compiles and installs everything from the package, rather
-# than just libpng12.so.0 as upstream does.  The additional installed files
-# are needed by other packages.  The x11-libs/cairo package is one example.
-
-EAPI=4
-
-inherit multilib libtool
-
-DESCRIPTION="Portable Network Graphics library"
-HOMEPAGE="http://www.libpng.org/"
-SRC_URI="mirror://sourceforge/${PN}/${P}.tar.xz"
-
-LICENSE="as-is"
-SLOT="0"
-KEYWORDS="alpha amd64 arm hppa ia64 m68k mips s390 sh sparc x86 ~sparc-fbsd ~x86-fbsd"
-IUSE=""
-
-RDEPEND="sys-libs/zlib
-	!=media-libs/libpng-1.2*:0"
-DEPEND="${RDEPEND}
-	app-arch/xz-utils"
-
-src_prepare() {
-	elibtoolize
-}
-
-src_configure() {
-	econf --disable-static
-}